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The geologic time classification of the United States Geological Survey compared with other classifications, accompanied by the original definitions of era, period and epoch terms /

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Bibliographic Details
Corporate Author: Geological Survey (U.S.)
Other Authors: Wilmarth, M. Grace (Mary Grace), 1866-1949 (Compiler)
Format: Government Document eBook
Language:English
Published: [Washington, D.C.] : Department of the Interior, United States Geological Survey, 1925.
Series:Bulletin (Geological Survey (U.S.)) ; no. 769.
Subjects:
Geology, Stratigraphic.
Geological time.
Online Access:https://purl.fdlp.gov/GPO/gpo61045
Description
Item Description:Title from title screen (viewed Sept. 23, 2015).
Physical Description:1 online resource (vi, 138 pages).
Bibliography:Includes bibliographical references and index.